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We’ve all been there. You’ve seen this great bike at a show, or online, and you’ve gotta build something like it. You can see yourself hammering down the street on it. You’ve scoured the interwebs and found a bunch of photos of the type of bike you love. Maybe you’ve even narrowed down the make and model of bike for a project donor.

But how do you take that factory stock bike into that custom head-turning two-wheeled icon? There are a lot of soft and hard skills you need to build a custom bike. The good news is you can learn these skills, and have a load of fun in the process. So if you are still with me, keep on reading. This article is pretty long.

But sign off now if you are impatient and have a lot of money. Just pay someone to build your bike in 12 weeks. And log off now if you don’t want to learn new skills, or put in the time to practice. Or if you are happy having the same bike as the guy down the street.

Just appreciate that the bikes featured on Bike EXIF have hundreds of hours of work in them. You can do it, just treat it like a long-term path with lots of learning on the journey. Let’s get started.

Extent of modifications The first step is to determine what you’re technically capable of right now, and how long you can wait before riding your custom bike. You have a choice:

1. Make gradual and minor modifications to your project bike, and keep it on the road the whole time.

2. Make drastic modifications to your bike, meaning it will be off the road until you finish.

Option (1) is my strongest suggestion for your first build. I’ve seen project bikes pulled to pieces, and then sold for less than scrap value when the owner/builder ran out of steam, or skills. Not their fault, but maybe they bit off more than they could chew.

This option lets you keep riding for the most part, but the visual changes to your bike might be limited. Minor modifications might be changing the seat, changing the fuel tank, adding bolt-on parts, or giving it a custom paint job.

Option (2) is certainly possible, but keep reading and hopefully you won’t end up selling your project for scrap. If you loving riding like me, you better have another bike to ride during your project build. Your bike could be off the road for some time (like, two years), so if you need to scratch that itch you better have your daily rider handy.

So, lets talk about the skills you might need, or want to develop as part of the build.

The Project Bike Decide what bike will be the basis for your customization. Maybe you’ve already decided it will be an air-cooled BMW, or a 70s Honda CB, or a Harley-Davidson. Regardless, here are a few things to consider:

1. Older bikes are generally less complicated—and therefore relatively easier to work on, both mechanically and electrically. If you bought a current model bike, you’d have to consider all the ‘electrickery’ that is needed to run the engine management system, not to mention the ABS, traction control, wheelie control, electronic suspension, and so on.

2. The more common older bikes seem to have more information and parts available. If you want to build a Triumph cafe racer, or a Harley-Davidson chopper, you’ll find that these platforms have plenty of reproduction ‘will fit’ and custom parts available.

3. Rare old bikes, are, in my opinion, reserved for masochists. Parts and information are limited. However, if you happen to find your dream project bike cheap, don’t let that deter you. Perhaps start with a simpler project and come back to the rare project bike in a few years.

4. Any bike with a carburetor (i.e., pre-fuel injection) has potential. Fuel injection adds a level of complexity for passing emissions laws that you don’t really need in a custom build. In many cases, bikes were built with carburetors up to around 2000, so the donor doesn’t have to be an ancient bike that is older than its owner.

My personal favorite is a 1970s-era Harley-Davidson. You can buy virtually every part either used, as ‘new-old-stock’ (NOS) or reproduction. There are a multitude of tanks and seats and custom parts available all over the world. There are heaps of online resources and books on these bikes. I can build a tracker or a bobber or a chopper or some other variation. And they are quite simple mechanically and electrically. All of these factors give me the confidence to buy one as a basis for a custom build.

Now it’s time for research to narrow down the custom style you like, and decide what donor bike will suit the mental picture you’ve got in your head.

Design skills Beauty is in the eye of the beholder, but some bikes simply look a whole lot better than others. Some folks (not me) can sketch out their bike and get the proportions just right. The rest of us have to rely on photos to make our own assessment of what looks ‘right.’

My method of cheating is to find a drawing of the frame, and build my sketch around the frame. Even if the frame might need modifications, the engine mounts and other important features can be highlighted.

Have a look on the web for a drawing of the frame for your project bike. Sketch out the wheel sizes you might want to use on another sheet, and cut them out. Put them next to the frame where they might be located. Sketch in a tank and seat.

We’ll cover this in much more detail in other post, but one way or another, you’ve got to form a picture of your project bike. Otherwise you’re leaving the outcome to luck and chance, and might not get the bike you wanted.

Project management skillsWikipedia says project management is “…the discipline of initiating, planning, executing, controlling, and closing the work of a team to achieve specific goals and meet specific success criteria.” This is an entire field of study on its own, so I like this simple graphic from Kepner-Tregoe:

The steps are pretty self-explanatory. I’m not suggesting all of them are essential for your build, but there are few that are worth a mention.

‘Develop objectives’ could be a sketch or photos of the inspiration for your bike. You could spend six months sketching your dream bike. And if this rocks your boat, then do it! And consider that the frame of your bike will determine a lot of the final look. So if you are aiming for something radical, then a custom frame (or highly modified frame) might be required, but that means a lot of extra work.

‘Develop work breakdown structure’ is a list of the actual steps—a breakdown of the tasks that make up your build. You might have a top-level idea of the tasks, like ‘install custom seat’ or ‘repaint fuel tank.’ But you could easily break these down into a dozen sub-tasks.

Even if you don’t know what these sub-tasks are right now, don’t worry—you’ll learn them on the journey. But at least make a list of the major, obvious tasks.

‘Sequence deliverables’ is putting the tasks into a logical order. For example, finishing the frame welding and fabrication BEFORE you do the paint.

Research skills You’re no doubt pretty comfortable with the Google machine, and can find answers to most of your questions. However, some sources are more useful than others. If you are sold on a particular make and model for your project bike, a model-specific forum is the best source of specific information. They’re not hard to find.

If you need to research very specific tasks, like how to disassemble a particular engine, an hour invested on a forum before you start the job will probably save you five hours down the track.

Technical drawing skills You’ll be modifying and maybe even fabricating parts for your bike, so it’s very useful to be able to design and draw them—before you start making irreversible cuts in expensive materials.

Sketchup is very quick and intuitive to learn and use—but in my experience, OnShape is more powerful, and it’s more useful to me as a mechanical engineer. OnShape recently changed its plans though, which has pushed me more towards Fusion360. All these packages have features and limitations, so try their free versions before you buy. And all have excellent tutorials and communities behind them, which are free to access.

Regardless of the medium and tools you use, it’s helpful to understand how to read and construct technical drawings. There are some great tutorials on the web here and free books on the topic here.

Workshop Equipment You are going to need somewhere to store your bike while it’s under construction, and equipment to work on it.

A build platform is very helpful, and beats working on cold concrete in the middle of a cold winter. These can be constructed simply from hardware store timber (construction pine and plywood is great). I’ve got a page and some free plans dedicated to constructing your own build platform. Look at this as one of your first learning exercises: You’ll have to learn to measure out material, cut it accurately, and nail or screw it all together.

Of course you can buy both low-end and high-end platforms if you have a spare thousand dollars or so. But you’re more likely to be on a budget, and unless mechanics is your profession, you can build one for under a hundred dollars.

More sophisticated versions like my first hydraulic platform are possible, but this is an intermediate project and needs some metalworking skills and a welding machine to build.

Other equipment such as engine cranes, sandblasting cabinets and air compressors are all very useful, but not critical to own.

Mechanical skills Working on a motorcycle will mean you get intimate with hand tools. Wrenches, screwdrivers, pliers and a crate full of other tools will become your friends. You are going to need to start collecting.

If you’re working on American bikes, imperial sized wrenches and sockets will generally be required. For Japanese and European bikes, you’ll generally need metric tools.

Note I said ‘generally.’ There will always be an exception, and you’ll soon search out and find those specific tools that you need for your bike.

A perfectly valid option is to scour eBay and your local trading sites for quality second hand tool sets. You might be able to buy better quality at used prices. Quality tools also give you a sense of satisfaction when working on your bike. You know you can always rely on quality tools, they limit damage to your parts, to the tools themselves, and minimize the risk of injuring yourself. And they tell you, and others, that you are serious about working on your bike.

A basic set of mechanical tools including sockets, wrenches, screwdrivers and pliers is a good start. Check out my suggestions here. These kits, and others similar, are available from your local hardware or tool suppliers. You can, and probably will, continue to grow your tool collection over years of working on your bike.

After buying these tools, you need to learn to use them correctly, so I’ve created a hand tools page with some fundamental videos. These will give you a brief introduction to the tools and how to use them.

You can also download this incredibly comprehensive US Army Technical Manual from my Google Drive. It has tons of useful information about different hand tools and how to use them.

Electrical skills I meet lots of people who are intimidated by the electrical systems on their motorcycles. But the electrical system is no more intimidating—and maybe even less—than complex carburetors. With enough skill, you can easily tackle electrical systems, especially on older motorcycles.

Depending on the work you need to do, the tools and consumables you need (wire, connectors, heat shrink and so on) will vary. We’ll cover this in a lot more detail in future.

At the very least you should invest in a digital multimeter for taking voltage measurements. These can be very inexpensive, and quite adequate for occasional use while working on motorcycles.

There are lots of references and books available on the topic. Most forums will have a lot of threads about the electrical system on your project bike, and can be a very specific source of information.

Lots of print material seems to assume you start with a good chunk of knowledge. But how do you get that basic knowledge in the first place? Again, we’ll cover this in extreme detail in further articles, but for now, put ‘electrical’ on the list of topics to research.

Metallurgy Understanding metals and their properties will help you to correctly select a metal for a particular application. When you are customizing a motorcycle, you end up working with metals in some manner.

Like all of the topics we are talking about in this article, metallurgy is a complete branch of science and engineering. You’ll have to learn enough to make a good decision about the metals on your motorcycle, so you don’t kill yourself or anyone else. A starting point is this article about the basic properties of metals.

Generally, metals are divided into ‘ferrous’ (those containing the element Iron) and ‘non-ferrous’ (those not containing Iron). If you mix metals together to produce a metal with specific properties, it is called an ‘alloy.’ A numbering system is used to identify the alloy and its contents. For example, ‘300-series’ is generally stainless steel.

Go take a fork out of your kitchen drawer. If it is stamped with ‘Stainless 18-8, it means 18% Chromium and 8% Nickel, making it a grade 304 stainless steel. ‘Chrome Moly Steel’ (or ‘CrMo’) is Chromium and Molybdenum mixed in with steel (which itself is Iron and Carbon). Chrome Moly steels are identified by the 4100-series numbers.

Aluminum (or ‘aluminium’ for my friends in the UK and down under) is another important material for motorcycles, due to its relatively high strength to weight. We’ll talk about these properties in far more detail later on, but the alloys of aluminum are very important in aerospace and automotive applications.

We can use aluminum for lightweight applications like tanks, fenders and bodywork, and non-structural parts like brackets or machined bar for use as spacers or foot pegs. You definitely wouldn’t choose to weld up a motorcycle frame out of aluminum tubes: Have a look at modern sportbike to see the size of the aluminum castings used for frames or swingarms.

The most common metals I use are steels (of various alloy, including stainless steel), aluminum and some bronze for bushings. These are all available at your local metal merchant, or online. We’ll talk about these applications in a later article.

Benchwork skills Benchwork is the use of basic hand tools to shape and form materials into shapes that you need. If you are building a custom with many ‘bolt-on’ parts, there is a chance you will finish your build without ever picking up a scribe, hacksaw and file.

But if you want to make a custom number plate bracket, relocate your speedometer, make some custom rear-set pegs, or build a complete fairing out of aluminum for a salt lake racer, you’ll need to start with benchwork.

Personally, I find benchwork the most satisfying activity when working on bikes. You take a sheet or chunk of metal, and cut, file, sand and finish a completely custom, one-off part that nobody else has. This is where you can let your creativity shine.

We’re going to cover a complete course later in benchwork, but for now, have a look at my benchwork tool list on Kit.com.

Metalworking and Fabrication skills Once you have painstakingly shaped a piece of metal on the bench, you generally need to perform some other ‘operations’ on it. You can cut, bend, shrink and stretch metal. Drill holes in it. Tap threads into it.

Bolt, screw, rivet or weld pieces together to form more complex assemblies. All of these subsequent operations are required to give you a part with the desired form and function. You might see now how the earlier steps of Design, Project Management, Technical Drawing, Metallurgy and Benchwork are parts of the process helping you reach this step.

We’ll cover other metalworking operations in detail later, but keep following along on the journey to build your skills to this point, where the customizing fun on your bike really kicks off.

Metal shaping skills (advanced) The four basic operations you can perform on metals are cut, bend, shrink and stretch. ‘Cut’ and ‘Bend’ are self-explanatory. If I was making an L-shaped bracket from some flat sheet metal, I would need to cut it out, then bend it into an L. But the art of metal shaping combines the additional steps of ‘shrinking’ and ‘stretching’ metal to form complex curves.

Fenders and tanks are made by using these additional processes. Metal shaping is an art and science on its own, but some of the basics can be applied to motorcycle parts using basic hand tools, some practice and lots of patience. Some of those tools are shown in this list on Kit.com.

Welding skills (advanced) When you’ve really got to step it up, you can start making more radical changes to your bike with some fabrication and welding skills.

By far I would recommend TIG (Tungsten Inert Gas), or more correctly ‘GTAW,’ which stands for ‘Gas Tungsten Arc Welding.’ TIG welding gives you lots of flexibility in the types of metals you can weld and the thicknesses of materials.

Welding is another complete skill and field of study, but you can definitely pick up enough to do some customizing of your motorcycle. A high quality welding machine that can tackle both ferrous and non-ferrous metals will probably cost in the vicinity of $1,000, so it’s a significant investment.

The best source of info for beginners (and more advanced welding) is Jody’s channel on YouTube, Welding Tips and Tricks.

Machining skills (advanced) Sometimes you need a special part for a special application. Maybe you’re adapting a different front wheel to your project bike, or need rearsets that are not available off-the-shelf. In these cases there is often no way of proceeding unless you can access a lathe and a milling machine.

This is a really advanced topic, as only 1 in 100 might have access to this equipment, and the rest will have to find an engineering shop prepared to make their parts (obviously at some cost).

Lathes and milling machines can be found secondhand at reasonable prices, however the tooling that is required with each can double or triple that cost.

Surface preparation skills Almost every custom project is going to need paint, powder coating or polishing. Preparing surfaces for these finishing techniques is essential if you plan to paint or polish yourself. And you can save money by not having to pay your paint or powder coat guy to do this step for you.

Your project bike might be suffering the effects of age and neglect, with caked-on dirt, oil leaks, corrosion, scratches and chipped paint. All these issues are easily addressed with the right know-how and elbow grease. And if you are aiming for a show-class result, it’s essential to prepare all your surfaces meticulously for the final finish.

Painting and polishing skills Once your parts have been stripped, cleaned, welded, sanded and otherwise modified, it’s time for the final finish and reassembly. And it’s surprising how much you can achieve in your home workshop or garage with aerosol cans of paint.

Would a professional painter in a spray booth achieve a better finish? Yes, of course. But you can learn plenty, achieve a sense of satisfaction, and control the costs of your project build by applying some of your own paint.

Polishing is somewhat similar. I have achieved mirror finishes on steel and aluminum using the systematic process shown in this video.

The Reveal Once you’ve combined all these elements, you have a custom bike, built by you, to your specifications. It might take two years, or five years, or ten years—but you’ll have the ultimate satisfaction knowing that it was all done by you.